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Gu Z. Male yaks adapt to heat stress with enhancement of immunomodulation, anti-oxidation, and blood oxygen delivery. J Therm Biol 2024; 123:103879. [PMID: 38906049 DOI: 10.1016/j.jtherbio.2024.103879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/21/2024] [Accepted: 05/15/2024] [Indexed: 06/23/2024]
Abstract
Yaks adapt to extremely low temperatures, but they are more susceptible to heat stress (HS). The adaptive mechanisms with crucial plasma protein markers regulating the response to HS remain elusive. In this study, data-independent acquisition proteomics were used to evaluate the thermal adaptability under chronic HS and thermal-neutral conditions. As a result, yaks increased body temperatures and respiratory rates in response to HS. Eight differential proteins mainly related to vasodilatation were decreased by HS, but another four proteins associated with blood oxygen delivery were presented at higher levels. Complement and coagulation cascades pathway was activated by HS, and more proteins were upregulated to protect against inflammation and oxidative stress by higher levels of antioxidant proteins. It is likely that yaks react to HS with enhancement of immunomodulation, anti-oxidation, and blood oxygen delivery, which is conducive to taking appropriate environment and nutrition management strategies to get healthy and high-performing yaks in low-altitude regions during summer.
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Affiliation(s)
- Zhaobing Gu
- Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming, 650201, China; Yunnan Provincial Key Laboratory of Animal Nutrition and Feed Science, Kunming, 650201, China.
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Perez Diaz N, Lione LA, Hutter V, Mackenzie LS. Co-Incubation with PPARβ/δ Agonists and Antagonists Modeled Using Computational Chemistry: Effect on LPS Induced Inflammatory Markers in Pulmonary Artery. Int J Mol Sci 2021; 22:ijms22063158. [PMID: 33808880 PMCID: PMC8003823 DOI: 10.3390/ijms22063158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 03/11/2021] [Accepted: 03/16/2021] [Indexed: 01/01/2023] Open
Abstract
Peroxisome proliferator activated receptor beta/delta (PPARβ/δ) is a nuclear receptor ubiquitously expressed in cells, whose signaling controls inflammation. There are large discrepancies in understanding the complex role of PPARβ/δ in disease, having both anti- and pro-effects on inflammation. After ligand activation, PPARβ/δ regulates genes by two different mechanisms; induction and transrepression, the effects of which are difficult to differentiate directly. We studied the PPARβ/δ-regulation of lipopolysaccharide (LPS) induced inflammation (indicated by release of nitrite and IL-6) of rat pulmonary artery, using different combinations of agonists (GW0742 or L-165402) and antagonists (GSK3787 or GSK0660). LPS induced release of NO and IL-6 is not significantly reduced by incubation with PPARβ/δ ligands (either agonist or antagonist), however, co-incubation with an agonist and antagonist significantly reduces LPS-induced nitrite production and Nos2 mRNA expression. In contrast, incubation with LPS and PPARβ/δ agonists leads to a significant increase in Pdk-4 and Angptl-4 mRNA expression, which is significantly decreased in the presence of PPARβ/δ antagonists. Docking using computational chemistry methods indicates that PPARβ/δ agonists form polar bonds with His287, His413 and Tyr437, while antagonists are more promiscuous about which amino acids they bind to, although they are very prone to bind Thr252 and Asn307. Dual binding in the PPARβ/δ binding pocket indicates the ligands retain similar binding energies, which suggests that co-incubation with both agonist and antagonist does not prevent the specific binding of each other to the large PPARβ/δ binding pocket. To our knowledge, this is the first time that the possibility of binding two ligands simultaneously into the PPARβ/δ binding pocket has been explored. Agonist binding followed by antagonist simultaneously switches the PPARβ/δ mode of action from induction to transrepression, which is linked with an increase in Nos2 mRNA expression and nitrite production.
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Affiliation(s)
- Noelia Perez Diaz
- School of Life and Medical Sciences, University of Hertfordshire, Hatfield AL10 9AB, UK; (N.P.D.); (L.A.L.); (V.H.)
| | - Lisa A. Lione
- School of Life and Medical Sciences, University of Hertfordshire, Hatfield AL10 9AB, UK; (N.P.D.); (L.A.L.); (V.H.)
| | - Victoria Hutter
- School of Life and Medical Sciences, University of Hertfordshire, Hatfield AL10 9AB, UK; (N.P.D.); (L.A.L.); (V.H.)
| | - Louise S. Mackenzie
- School of Life and Medical Sciences, University of Hertfordshire, Hatfield AL10 9AB, UK; (N.P.D.); (L.A.L.); (V.H.)
- School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton BN2 4GJ, UK
- Correspondence:
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Shan J, Kimura H, Yokoi S, Kamiyama K, Imamoto T, Takeda I, Kobayashi M, Mikami D, Takahashi N, Kasuno K, Sugaya T, Iwano M. PPAR-δ activation reduces cisplatin-induced apoptosis via inhibiting p53/Bax/caspase-3 pathway without modulating autophagy in murine renal proximal tubular cells. Clin Exp Nephrol 2021; 25:598-607. [PMID: 33646450 DOI: 10.1007/s10157-021-02039-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 02/22/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Cisplatin-induced injury of renal proximal tubular cells results basically from increased apoptosis via mitochondrial damage, and is mitigated by appropriate enhancement of autophagy. Peroxisome proliferator-activated receptor-delta (PPAR-δ) reportedly protects against not only mitochondrial damages but also enhances autophagy. Thus, PPAR-δ may protect against cisplatin-induced kidney injury. METHODS We examined the protective effects of PPAR-δ activation on cisplatin-induced cellular injury and their detailed mechanisms in a murine renal proximal tubular (mProx) cell line using GW0742, an authentic PPAR-δ activator. Cisplatin-induced cell damages were evaluated by TUNEL assay and immunoblot analyses for p53, 14-3-3, Bax, Bcl2, cytochrome C, and activated caspases. Autophagy status was examined by immunoblot analyses for p62 and LC3. RESULTS GW0742 suppressed cisplatin-induced apoptosis of mProx cells by reducing the activation of caspase-3 via attenuating the phosphorylation of p53 and 14-3-3, mitochondrial Bax accumulation, cytochrome C release from mitochondria to the cytosol and ensuing cytosolic caspase-9 activation. In contrast, GW0742 did not diminish cisplatin-enhanced activation of caspases-8 or -12 as extrinsic or endothelium reticulum apoptotic pathways, respectively. The inhibitory effect of GW0742 on cisplatin-induced caspase-3 activation was significantly diminished by silencing of the PPAR-δ gene expression. GW0742 itself had no influence on starvation-stimulated or cisplatin-induced autophagy in mProx cells, suggesting that the protective effects were not mediated by autophagy modification. CONCLUSION Our results indicate that GW0742 may serve as a candidate agent to mitigate cisplatin nephrotoxicity via inhibiting the mitochondrial apoptotic pathway considerably depending on PPAR-δ, without modulating autophagy.
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Affiliation(s)
- Juanping Shan
- Division of Nephrology, Shaoxing Peoples' Hospital, Shaoxing, China
| | - Hideki Kimura
- Department of Clinical Laboratory, University of Fukui Hospital, 23-3 Matsuoka-shimoaizuki, Eiheiji-cho, Yoshida, Fukui, 910-1193, Japan.
| | - Seiji Yokoi
- Division of Nephrology, Department of General Medicine, School of Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Kazuko Kamiyama
- Division of Nephrology, Department of General Medicine, School of Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Toru Imamoto
- Department of Clinical Laboratory, University of Fukui Hospital, 23-3 Matsuoka-shimoaizuki, Eiheiji-cho, Yoshida, Fukui, 910-1193, Japan
| | - Izumi Takeda
- Department of Clinical Laboratory, University of Fukui Hospital, 23-3 Matsuoka-shimoaizuki, Eiheiji-cho, Yoshida, Fukui, 910-1193, Japan
| | - Mamiko Kobayashi
- Division of Nephrology, Department of General Medicine, School of Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Daisuke Mikami
- Division of Nephrology, Department of General Medicine, School of Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Naoki Takahashi
- Division of Nephrology, Department of General Medicine, School of Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Kenji Kasuno
- Division of Nephrology, Department of General Medicine, School of Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | | | - Masayuki Iwano
- Division of Nephrology, Department of General Medicine, School of Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
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Zhang Y, Du H, Yu X, Zhu J. Fucoidan attenuates hyperoxia-induced lung injury in newborn rats by mediating lung fibroblasts differentiate into myofibroblasts. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:1501. [PMID: 33313246 PMCID: PMC7729344 DOI: 10.21037/atm-20-6601] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Background Hyperoxia-induced lung injury is one of the most common and frequent diseases in premature infants and may develop into bronchopulmonary dysplasia (BPD). Fucoidan, extracted from brown seaweed and brown algae, has anti-apoptosis, antioxidative and anti-fibrosis effects. This study aimed to explore whether fucoidan could alleviate hyperoxia-induced lung injury in newborn rats. Methods Lung wet-weight/dry-weight (W/D) ratio, total protein (TP) content, total cell counts, and lactate dehydrogenase (LDH) levels are used to evaluate lung injury. Masson staining is used to evaluate lung fibrotic. Tunnel assay and Hoechst 33258 assay were used to evaluate apoptosis. The levels of serum superoxide dismutase (SOD), malondialdehyde (MDA), and glutathione (GSH) were measured using ELISA to assess oxidative stress. Western blot assay was used to detect apoptosis-related proteins Bcl-1, Bax, and myofibroblast proteins α-SMA. Results The data indicating fucoidan treatment remarkably reduces the lung W/D ratio and TP content, total cell counts, and LDH levels in bronchoalveolar lavage fluid (BALF). Also, fucoidan treatment significantly inhibited cell apoptosis with the elevated expression of Bcl-2/Bax in cultured lung fibroblasts. Moreover, treatment with fucoidan suppressed the levels of MDA significantly and elevated the level of SOD and GSH, showing that oxidative stress was restrained by fucoidan. Furthermore, the decreased expression levels of α-SMA and collagen I was detected in fibroblast treated with fucoidan. Conclusions These data suggest fucoidan may protect the lung from hyperoxia via suppressing cell apoptosis, mitigating oxidative stress, and inhibiting lung fibroblasts from differentiating into myofibroblasts.
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Affiliation(s)
- Yan Zhang
- Department of Geriatric Medicine, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, University Hospital of Electronic Science & Technology, Chengdu, China
| | - Hengjian Du
- Department of Geriatric Infectious Diseases, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, University Hospital of Electronic Science & Technology, Chengdu, China
| | - Xuelian Yu
- Department of Geriatric Medicine, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, University Hospital of Electronic Science & Technology, Chengdu, China
| | - Jiang Zhu
- Department of Respiratory and Critical Care Medicine, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, University Hospital of Electronic Science & Technology, Chengdu, China
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Capozzi ME, Savage SR, McCollum GW, Hammer SS, Ramos CJ, Yang R, Bretz CA, Penn JS. The peroxisome proliferator-activated receptor-β/δ antagonist GSK0660 mitigates retinal cell inflammation and leukostasis. Exp Eye Res 2020; 190:107885. [PMID: 31758977 PMCID: PMC7426872 DOI: 10.1016/j.exer.2019.107885] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 11/19/2019] [Accepted: 11/19/2019] [Indexed: 12/18/2022]
Abstract
Diabetic retinopathy (DR) is triggered by retinal cell damage stimulated by the diabetic milieu, including increased levels of intraocular free fatty acids. Free fatty acids may serve as an initiator of inflammatory cytokine release from Müller cells, and the resulting cytokines are potent stimulators of retinal endothelial pathology, such as leukostasis, vascular permeability, and basement membrane thickening. Our previous studies have elucidated a role for peroxisome proliferator-activated receptor-β/δ (PPARβ/δ) in promoting several steps in the pathologic cascade in DR, including angiogenesis and expression of inflammatory mediators. Furthermore, PPARβ/δ is a known target of lipid signaling, suggesting a potential role for this transcription factor in fatty acid-induced retinal inflammation. Therefore, we hypothesized that PPARβ/δ stimulates both the induction of inflammatory mediators by Müller cells as well the paracrine induction of leukostasis in endothelial cells (EC) by Müller cell inflammatory products. To test this, we used the PPARβ/δ inhibitor, GSK0660, in primary human Müller cells (HMC), human retinal microvascular endothelial cells (HRMEC) and mouse retina. We found that palmitic acid (PA) activation of PPARβ/δ in HMC leads to the production of pro-angiogenic and/or inflammatory cytokines that may constitute DR-relevant upstream paracrine inflammatory signals to EC and other retinal cells. Downstream, EC transduce these signals and increase their synthesis and release of chemokines such as CCL8 and CXCL10 that regulate leukostasis and other cellular events related to vascular inflammation in DR. Our results indicate that PPARβ/δ inhibition mitigates these upstream (MC) as well as downstream (EC) inflammatory signaling events elicited by metabolic stimuli and inflammatory cytokines. Therefore, our data suggest that PPARβ/δ inhibition is a potential therapeutic strategy against early DR pathology.
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Affiliation(s)
- Megan E Capozzi
- Department of Molecular Physiology and Biophysics, Vanderbilt University, USA.
| | - Sara R Savage
- Department of Pharmacology, Vanderbilt University, USA
| | - Gary W McCollum
- Department of Ophthalmology and Visual Sciences, Vanderbilt University Medical Center, USA
| | - Sandra S Hammer
- Department of Cell and Developmental Biology, Vanderbilt University, USA
| | - Carla J Ramos
- Department of Ophthalmology and Visual Sciences, Vanderbilt University Medical Center, USA
| | - Rong Yang
- Department of Ophthalmology and Visual Sciences, Vanderbilt University Medical Center, USA
| | - Colin A Bretz
- Department of Cell and Developmental Biology, Vanderbilt University, USA
| | - John S Penn
- Department of Molecular Physiology and Biophysics, Vanderbilt University, USA; Department of Pharmacology, Vanderbilt University, USA; Department of Ophthalmology and Visual Sciences, Vanderbilt University Medical Center, USA; Department of Cell and Developmental Biology, Vanderbilt University, USA
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Ahmed RF, Moussa RA, Eldemerdash RS, Zakaria MM, Abdel-Gaber SA. Ameliorative effects of silymarin on HCl-induced acute lung injury in rats; role of the Nrf-2/HO-1 pathway. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES 2019; 22:1483-1492. [PMID: 32133068 PMCID: PMC7043873 DOI: 10.22038/ijbms.2019.14069] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 07/03/2019] [Indexed: 12/25/2022]
Abstract
OBJECTIVES Aspiration is a common cause of acute lung injury (ALI), which lacks an effective treatment. Inflammation and oxidative stress play key roles in ALI development. Silymarin is an active extract of Silybum marianum plant seeds (milk thistle). Silymarin has potent anti-inflammatory and antioxidant effects; however its role in aspiration induced ALI has not been investigated. The aim of this study is to investigate the role of silymarin in the treatment of hydrochloric acid (HCl) aspiration induced ALI and explores its mechanisms of action. MATERIALS AND METHODS The study included three groups of rats: Control non-treated group, ALI group (intra-tracheal HCl injected), and silymarin treated ALI group. White blood cells (WBCs) with differential count, oxidative stress parameters, B-cell lymphoma 2 (Bcl-2), transforming growth factor-beta (TGF-β), cyclooxygenase 2 (COX-2), nuclear factor erythroid 2-related factor-2 (Nrf-2), and heme oxygenase-1 (HO-1) were investigated. Lung tissue histopathology and immunohistochemical expression of survivin and proliferating cell nuclear antigen (PCNA) were also examined. RESULTS The results of the study showed that HCL caused histopathological changes in ALI with leukocytopenia and increased oxidative stress biomarkers. It increased TGF-β, up-regulated mRNA expression of COX-2, Nrf-2, and HO-1 and increased survivin and PCNA but decreased Bcl-2. Silymarin ameliorated the histopathological lung injury with further up-regulation of Nrf-2 and HO-1 mRNA and decreased the inflammatory and fibrotic parameters together with up-regulation of the anti-apoptotic and the proliferation parameters. CONCLUSION The protective effect of silymarin against ALI is mediated by Nrf-2/HO-1 pathway with subsequent antioxidant, anti-inflammatory, antiapoptotic, and proliferating activities.
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Affiliation(s)
- Rasha F Ahmed
- Department of Medical Biochemistry, Faculty of Medicine, Minia University, 61511 Minia, Egypt
| | - Rabab A Moussa
- Department of Pathology, Faculty of Medicine, Minia University, 61511 Minia, Egypt
| | - Reda S Eldemerdash
- Research Building, Urology & Nephrology Center, Mansoura University, 35516 Mansoura, Egypt
| | - Mahmoud M Zakaria
- Research Building, Urology & Nephrology Center, Mansoura University, 35516 Mansoura, Egypt
| | - Seham A Abdel-Gaber
- Department of Pharmacology, Faculty of Medicine, Minia University, 61511 Minia, Egypt
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Liu H, Hao J, Wu C, Liu G, Wang X, Yu J, Liu Y, Zhao H. Eupatilin Alleviates Lipopolysaccharide-Induced Acute Lung Injury by Inhibiting Inflammation and Oxidative Stress. Med Sci Monit 2019; 25:8289-8296. [PMID: 31680664 PMCID: PMC6854882 DOI: 10.12659/msm.917406] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Eupatilin, an active flavone separated from Artemisia species, has various biological activity such as anti-inflammatory activity. The aim of the present study was to find out the influence of eupatilin on lipopolysaccharide (LPS)-induced acute lung injury (ALI) in rats. MATERIAL AND METHODS The administration of LPS was used to induce ALI; eupatilin was given 1 hour before the LPS administration. Lung structural damage of rats was analyzed by hematoxylin and eosin staining and the wet/dry lung ratio. The related inflammatory factors and lung injury markers were examined by enzyme-linked immunosorbent assay. The oxidative stress factors were analyzed by corresponding kits. The expression of peroxisome proliferator-activated receptor-alpha (PPAR-alpha) was assayed by western blot and immunohistochemical staining. RESULTS The results showed that eupatilin alleviated LPS-induced structural damage and decreased the wet/dry lung ratio concentration-dependently. Eupatilin decreased the level of surfactant protein (SP)-A, SP-D, and inflammatory factors such as interleukin (IL)-6, tumor necrosis factor (TNF)-alpha, and monocyte chemo-attractant protein (MCP)-1. LPS trigged nitric oxide (NO) generation, improved the production of malondialdehyde (MDA) and lactate dehydrogenase (LDH) and decreased the activity of superoxide dismutase (SOD), which were reversed when rats treated with eupatilin in a concentration-dependent way. Besides, the expression of PPAR-a was increased under the treatment of eupatilin. CONCLUSIONS Collectively, eupatilin alleviated LPS-induced ALI through inhibiting inflammation and oxidative stress in a concentration-dependent way, which was likely to be closely related with the activation of PPAR-alpha.
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Affiliation(s)
- Haiying Liu
- Department of Pediatrics, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China (mainland).,Department of Pediatrics, Affiliated Shenzhen Maternity and Child Healthcare Hospital, Southern Medical University, Shenzhen, Guangdong, China (mainland)
| | - Jindou Hao
- Department of Pediatrics, Affiliated Shenzhen Maternity and Child Healthcare Hospital, Southern Medical University, Shenzhen, Guangdong, China (mainland)
| | - Chunyuan Wu
- Department of Pediatrics, Affiliated Shenzhen Maternity and Child Healthcare Hospital, Southern Medical University, Shenzhen, Guangdong, China (mainland)
| | - Guosheng Liu
- Department of Pediatrics, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China (mainland)
| | - Xing Wang
- Department of Pediatrics, Affiliated Shenzhen Maternity and Child Healthcare Hospital, Southern Medical University, Shenzhen, Guangdong, China (mainland)
| | - Jieming Yu
- Department of Pediatrics, Affiliated Shenzhen Maternity and Child Healthcare Hospital, Southern Medical University, Shenzhen, Guangdong, China (mainland)
| | - Yu Liu
- Department of Pediatrics, Affiliated Shenzhen Maternity and Child Healthcare Hospital, Southern Medical University, Shenzhen, Guangdong, China (mainland)
| | - Hongxia Zhao
- Department of Pediatrics, Affiliated Shenzhen Maternity and Child Healthcare Hospital, Southern Medical University, Shenzhen, Guangdong, China (mainland)
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Zhao S, Luo G, Wu H, Zhang L. Placental growth factor gene silencing mitigates the epithelial‑to‑mesenchymal transition via the p38 MAPK pathway in rats with hyperoxia‑induced lung injury. Mol Med Rep 2019; 20:4867-4874. [PMID: 31702808 PMCID: PMC6854522 DOI: 10.3892/mmr.2019.10785] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 07/26/2019] [Indexed: 02/06/2023] Open
Abstract
Hyperoxia may cause pulmonary fibrosis in neonates and is characterized by the epithelial-to-mesenchymal transition (EMT) of alveolar epithelial cells. The placental growth factor (PLGF) gene is a member of the vascular endothelial growth factor family and is highly expressed in lung tissues that have been exposed to hyperoxia. The aim of the present study was to assess the role of PLGF in the EMT of lung tissue. Lung tissue exhibiting low PLGF expression was obtained by injecting rats exposed to hyperoxia with a PLGF-silencing lentiviral plasmid. Western blot analysis and immunohistochemistry revealed that expression levels of the EMT-related protein epithelial-cadherin were increased, whereas its inhibitor protein zinc-finger E-box binding homeobox 2 was decreased in these rats. These data demonstrated that PLGF silencing may significantly mitigate hyperoxia-induced EMT in rat lung tissue. Additionally, an increase in phosphorylated-p38 MAPK protein expression indicated that PLGF may be able to regulate hyperoxia-induced lung injury in rats via the p38 MAPK pathway.
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Affiliation(s)
- Shuang Zhao
- Department of Pediatrics, The Fourth People's Hospital of Shenyang, Shenyang, Liaoning 110003, P.R. China
| | - Gang Luo
- Department of Pediatrics, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Hongmin Wu
- Department of Neonatology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Liang Zhang
- Department of Neonatology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
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Dose-dependent effects of peroxisome proliferator-activated receptors β/δ agonist on systemic inflammation after haemorrhagic shock. Cytokine 2017; 103:127-132. [PMID: 28969938 DOI: 10.1016/j.cyto.2017.09.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 08/27/2017] [Accepted: 09/20/2017] [Indexed: 11/20/2022]
Abstract
INTRODUCTION PPARβ/δ agonists are known to modulate the systemic inflammatory response after sepsis. In this study, inflammation modulation effects of PPARβ/δ are investigated using the selective PPARβ/δ agonist (GW0742) in a model of haemorrhagic shock (HS)-induced sterile systemic inflammation. METHODS Blood pressure-controlled (35±5mmHg) HS was performed in C57/BL6 mice for 90min. Low-dose GW0742 (0.03mg/kg/BW) and high-dose GW0742 (0.3mg/kg/BW) were then administered at the beginning of resuscitation. Mice were sacrificed 6h after induction of HS. Plasma levels of IL-6, IL-1β, IL-10, TNFα, KC, MCP-1, and GM-CSF were determined by ELISA. Myeloperoxidase (MPO) activity in pulmonary and liver tissues was analysed with standardised MPO kits. RESULTS In mice treated with high-dose GW0742, plasma levels of IL-6, IL-1β, and MCP-1 were significantly increased compared to the control group mice. When compared to mice treated with low-dose GW0742 plasma levels of IL-6, IL-1β, GM-CSF, KC, and MCP-1 were significantly elevated in high-dose-treated mice. Low-dose GW0742 treatment was associated with a non-significant downtrend of inflammatory factors in mice with HS. No significant changes of MPO activity in lung and liver were observed between the control group and the GW0742 treatment groups. CONCLUSION This study identified dose-dependent effects of GW0742 on systemic inflammation after HS. While high-dose GW0742 substantially enhanced the systemic inflammatory response, low-dose GW0742 led to a downtrend of pro-inflammation cytokine expression. The exact mechanisms are yet unknown and need to be assessed in further studies.
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Zhang L, Zhao S, Yuan L, Wu H, Jiang H, Luo G. Placenta growth factor contributes to cell apoptosis and epithelial-to-mesenchymal transition in the hyperoxia-induced acute lung injury. Life Sci 2016; 156:30-37. [DOI: 10.1016/j.lfs.2016.05.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 05/06/2016] [Accepted: 05/17/2016] [Indexed: 01/10/2023]
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Gao JW, Zeng L, Zhang AQ, Wang X, Pan W, Du DY, Zhang LY, Gu W, Jiang JX. Identification of Haplotype Tag Single-Nucleotide Polymorphisms within the PPAR Family Genes and Their Clinical Relevance in Patients with Major Trauma. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:374. [PMID: 27023591 PMCID: PMC4847036 DOI: 10.3390/ijerph13040374] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 03/19/2016] [Accepted: 03/22/2016] [Indexed: 01/10/2023]
Abstract
Background: Peroxisome proliferator-activated receptors (PPARs) play important roles in the development of inflammatory diseases and sepsis. Recently, genetic variants of PPARs genes have been widely studied in some inflammatory diseases. However, the association between PPAR family of genes polymorphisms and sepsis risk in trauma patients was little known. Methods: SNPs were selected from the PPARs genes through constructing haplotype blocks and genotyped by the improved multiplex ligation detection reaction (iMLDR) method. The association between the selected SNPs and the risk of sepsis and multiple organ dysfunction (MOD) scores was evaluated in 734 trauma patients. In addition, tumor necrosis factor α (TNFα) production of peripheral blood leukocytes was also analyzed after lipopolysaccharide (LPS) stimulation. Results: Our results revealed that there were significant associations between the rs10865710 polymorphism and the risk of sepsis and MOD scores in Chinese Han trauma patients. Further, we found that the level of TNFα production was higher in patients with the rs10865710 G allele compared to those with the variant C allele. Conclusions: The rs10865710 polymorphism in the PPARγ gene might be used to assess the risk of sepsis and multiple organ dysfunction syndrome (MODS) in trauma patients.
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Affiliation(s)
- Jun-Wei Gao
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Daping, Chongqing 400042, China.
| | - Ling Zeng
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Daping, Chongqing 400042, China.
| | - An-Qiang Zhang
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Daping, Chongqing 400042, China.
| | - Xiao Wang
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Daping, Chongqing 400042, China.
| | - Wei Pan
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Daping, Chongqing 400042, China.
| | - Ding-Yuan Du
- Chongqing Emergency Medical Center, Chongqing 40042, China.
| | - Lian-Yang Zhang
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Daping, Chongqing 400042, China.
| | - Wei Gu
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Daping, Chongqing 400042, China.
| | - Jian-Xin Jiang
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Daping, Chongqing 400042, China.
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Luo F, Zhou R, Lei H, Mou Y, Zhang P, Sun Y, Chen T, He L, Yan T. Umbelliferone attenuates lipopolysaccharide-induced acute lung injury linked with regulation of TLRs–MyD88 and RIP140/NF-κB signaling pathways. RSC Adv 2016. [DOI: 10.1039/c6ra18293c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Umbelliferone (Umb), isolated from the chloroform fraction of Potentilla evestita, exerts a variety of pharmacological activities.
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Affiliation(s)
- Fen Luo
- Department of Physiology and Pharmacology
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Rui Zhou
- Department of Physiology and Pharmacology
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Hui Lei
- Pharmaceutical Experiment Center of China Pharmaceutical University
- Nanjing 211198
- China
| | - Yi Mou
- Taizhou University
- Taizhou 225300
- China
| | - Ping Zhang
- Department of Pharmaceutics
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Yi Sun
- Department of Pharmacology
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Tong Chen
- State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
- Department of Pharmacology
| | - Ling He
- Department of Pharmacology
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Tianhua Yan
- Department of Physiology and Pharmacology
- China Pharmaceutical University
- Nanjing 210009
- China
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